Solved

Find the Sum Using the Formulas for the Sums of Powers

Question 209

Multiple Choice

Find the sum using the formulas for the sums of powers of integers. $\sum _ { n = 1 } ^ { 8 } \left( 7 n - 3 n ^ { 2 } \right)$

A) -224
B) -1080
C) -136
D) 144
E) -360

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